Research on Mathematical Simulation System and Its Key Technologies for Satellite Constellation Navigation System

In order to study the performance of satellite navigation system, such as satellite constellation coverage performance, signal links, time system and so on, it is necessary to build the mathematics simulation system for satellite navigation system that can simulate working statuses on different modes and its results can be analyzed and evaluated. The project of satellite navigation simulation system based on High Level Architecture (HLA) was designed. At the same time the satellite navigation constellation subsystem and its support technologies were designed. Then, time propagation, data distribute manage and orbit determination were analyzed and studied. The experimental results show that the simulation system designed could fit the simulation and evaluation needs of satellite navigation simulation system better. The research is of great valve to the realization of our BD satellite navigation system.